Originally Posted by 01001010
You're out of luck. There's a reason why they don't sell used software.
There's the reason you don't buy used software as well.
Edit: On the bottom of your laptop there will be a serial key for the version of windows that came pre-installed on the machine. This won't work for the new CD you got, but at least you'll be able to get the original OS back on.
Humans are the only creatures that won't live up to the their potential. Give everything your all. When you die, die on E.
So I ask you, what do you intend to do now?